I discovered a link that stated that Charles Murray was invited to speak at a college about race and intelligence. Joseph Graves was also invited. You can see the details in the link below. http://williamsrecord.com/2016/03/16/ul-invites-charles-murray-to-deliver-speech-at-the-college/ I asked Graves about the debate and whether there was video. This is his reply: So like Rushton it seems that Charles Murray also avoided Graves.